Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          2        0.02        0.02
          0 |         54        0.54        0.56
          1 |      1,069       10.69       11.25
          2 |        645        6.45       17.70
          3 |        719        7.19       24.89
          4 |        908        9.08       33.97
          5 |         48        0.48       34.45
          6 |        234        2.34       36.79
          7 |        275        2.75       39.54
          8 |        233        2.33       41.87
          9 |        425        4.25       46.12
          A |        903        9.03       55.15
          B |        164        1.64       56.79
          C |        519        5.19       61.98
          D |        340        3.40       65.38
          E |        153        1.53       66.91
          F |         44        0.44       67.35
          G |        370        3.70       71.05
          H |        107        1.07       72.12
          J |         21        0.21       72.33
          K |        201        2.01       74.34
          L |         70        0.70       75.04
          M |        619        6.19       81.23
          N |        399        3.99       85.22
          P |        104        1.04       86.26
          R |          8        0.08       86.34
          S |         78        0.78       87.12
          T |        784        7.84       94.96
          U |        210        2.10       97.06
          V |         75        0.75       97.81
          W |         88        0.88       98.69
          X |         89        0.89       99.58
          Y |         26        0.26       99.84
          Z |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016